AMAZING movie. Another ones like this? read!

Ok, I will not be writing on what was cool and what wasn't. This piece kickes ass hard.
I want to ask you people for movies similar to this description:


Required things, that have something to do with plot.

1. A monster/alien/creature movie.
2. The entity is partially explained in the flick. Not necesarily its origin, but what makes it tick and how to defend from it. Not necesarily kill it.
3. Remote/isolated/distant/never heard of environment.
4. Characters are discovering specifics of the entity on their own pace, not all things at the same time.
5. Suspence amd mystery!
6. At least SOME amount of action, or something that makes me go like: Oh, god, what happens next? what now!?!


Optional things that makes no difference and/or are not affecting the plot:

1. No annoying characters like in most Steven King's movies. ie, stupid/religious woman in The fog(remake) or stupid/annoying buisenessman from The langoliers
2. No stupid/sexy/highschool blondes and tits flapping around left and right.
3. The monster is preferred not being a zombie, although 28 days later redefined the genre.
4. No Uwe Boll. Actually that one should be in requirements.
5. Not necesarily a horror movie.

BUDGET IS IRRELEVANT! Same goes for the ending good/bad and the gore.

The most compelling examples of this description are:
The thing
Tremors (with its sequel)
Splinter
The faculty
Pitch black
Alien
The sphere
From dusk till dawn (Sure, it's vampires, but that one goes here because you never knew what hit'em until half of the movie, and then it got all of the required things)

So please. Feel free to add something to this list. Maybe we'll discover something together.